<?php
/**
 * @brief		Editor Extension: Announcements
 * @since		08 Dec 2014
 */

namespace IPS\core\extensions\core\EditorLocations;

/* To prevent PHP errors (extending class does not exist) revealing path */
if ( !\defined( '\IPS\SUITE_UNIQUE_KEY' ) )
{
	header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
	exit;
}

/**
 * Editor Extension: Announcements
 */
class _Announcement
{
	/**
	 * Can we use HTML in this editor?
	 *
	 * @param	\IPS\Member					$member	The member
	 * @param	\IPS\Helpers\Form\Editor	$field	The editor field
	 * @return	bool|null	NULL will cause the default value (based on the member's permissions) to be used, and is recommended in most cases. A boolean value will override that.
	 */
	public function canUseHtml( $member, $field )
	{
		return NULL;
	}
	
	/**
	 * Can we use attachments in this editor?
	 *
	 * @param	\IPS\Member					$member	The member
	 * @param	\IPS\Helpers\Form\Editor	$field	The editor field
	 * @return	bool|null	NULL will cause the default value (based on the member's permissions) to be used, and is recommended in most cases. A boolean value will override that.
	 */
	public function canAttach( $member, $field )
	{
		return NULL;
	}

	/**
	 * Permission check for attachments
	 *
	 * @param	\IPS\Member	$member		The member
	 * @param	int|null	$id1		Primary ID
	 * @param	int|null	$id2		Secondary ID
	 * @param	string|null	$id3		Arbitrary data
	 * @param	array		$attachment	The attachment data
	 * @param	bool		$viewOnly	If true, just check if the user can see the attachment rather than download it
	 * @return	bool
	 */
	public function attachmentPermissionCheck( $member, $id1, $id2, $id3, $attachment, $viewOnly=FALSE )
	{
		return \IPS\core\Announcements\Announcement::load( $id1 )->canView( $member );
	}
	
	/**
	 * Attachment lookup
	 *
	 * @param	int|null	$id1	Primary ID
	 * @param	int|null	$id2	Secondary ID
	 * @param	string|null	$id3	Arbitrary data
	 * @return	\IPS\Http\Url|\IPS\Content|\IPS\Node\Model
	 * @throws	\LogicException
	 */
	public function attachmentLookup( $id1, $id2, $id3 )
	{
        return \IPS\core\Announcements\Announcement::load( $id1 );
	}

	/**
	 * Rebuild attachment images in non-content item areas
	 *
	 * @param	int|null	$offset	Offset to start from
	 * @param	int|null	$max	Maximum to parse
	 * @return	int			Number completed
	 * @note	This method is optional and will only be called if it exists
	 */
	public function rebuildAttachmentImages( $offset, $max )
	{
		return $this->performRebuild( $offset, $max, array( 'IPS\Text\Parser', 'rebuildAttachmentUrls' ) );
	}

	/**
	 * Rebuild content post-upgrade
	 *
	 * @param	int|null	$offset	Offset to start from
	 * @param	int|null	$max	Maximum to parse
	 * @return	int			Number completed
	 * @note	This method is optional and will only be called if it exists
	 */
	public function rebuildContent( $offset, $max )
	{
		return $this->performRebuild( $offset, $max, array( 'IPS\Text\LegacyParser', 'parseStatic' ) );
	}

	/**
	 * @brief	Use the cached image URL instead of the original URL
	 */
	protected $proxyUrl	= FALSE;

	/**
	 * Rebuild content to add or remove image proxy
	 *
	 * @param	int|null		$offset		Offset to start from
	 * @param	int|null		$max		Maximum to parse
	 * @param	bool			$proxyUrl	Use the cached image URL instead of the original URL
	 * @return	int			Number completed
	 * @note	This method is optional and will only be called if it exists
	 */
	public function rebuildImageProxy( $offset, $max, $proxyUrl = FALSE )
	{
		$this->proxyUrl = $proxyUrl;
		return $this->performRebuild( $offset, $max, 'parseImageProxy' );
	}

	/**
	 * @brief	Store lazy loading status ( true = enabled )
	 */
	protected $_lazyLoadStatus = null;

	/**
	 * Rebuild content to add or remove lazy loading
	 *
	 * @param	int|null		$offset		Offset to start from
	 * @param	int|null		$max		Maximum to parse
	 * @param	bool			$status		Enable/Disable lazy loading
	 * @return	int			Number completed
	 * @note	This method is optional and will only be called if it exists
	 */
	public function rebuildLazyLoad( $offset, $max, $status=TRUE )
	{
		$this->_lazyLoadStatus = $status;

		return $this->performRebuild( $offset, $max, 'parseLazyLoad' );
	}

	/**
	 * Perform rebuild - abstracted as the call for rebuildContent() and rebuildAttachmentImages() is nearly identical
	 *
	 * @param	int|null	$offset		Offset to start from
	 * @param	int|null	$max		Maximum to parse
	 * @param	callable	$callback	Method to call to rebuild content
	 * @return	int			Number completed
	 */
    protected function performRebuild( $offset, $max, $callback )
    {
        $did	= 0;

        foreach( \IPS\Db::i()->select( '*', 'core_announcements', "announce_content IS NOT NULL", 'announce_id ASC', array( $offset, $max ) ) as $announcement )
        {
            $did++;

            /* Update */
            try
            {
				if( $callback == 'parseImageProxy' )
				{
					$rebuilt = \IPS\Text\Parser::removeImageProxy( $announcement['announce_content'], $this->proxyUrl );
				}
				elseif( $callback == 'parseLazyLoad' )
				{
					$rebuilt = \IPS\Text\Parser::parseLazyLoad( $announcement['announce_content'], $this->_lazyLoadStatus );
				}
				else
				{
				  $rebuilt	= $callback( $announcement['announce_content'], \IPS\Member::load( $announcement['announce_member_id'] ), FALSE, 'core_Announcement' );
				}
            }
            catch( \InvalidArgumentException $e )
            {
                if( $callback[1] == 'parseStatic' AND $e->getcode() == 103014 )
                {
                    $rebuilt	= preg_replace( "#\[/?([^\]]+?)\]#", '', $announcement['announce_content'] );
                }
                else
                {
                    throw $e;
                }
            }

            if( $rebuilt !== FALSE )
            {
                \IPS\Db::i()->update( 'core_announcements', array( 'announce_content' => $rebuilt ), array( 'announce_id=?', $announcement['announce_id'] ) );
            }
        }

        return $did;
    }

	/**
	 * Total content count to be used in progress indicator
	 *
	 * @return	int			Total Count
	 */
	public function contentCount()
	{
        return \IPS\Db::i()->select( 'COUNT(*) as count', 'core_announcements', "announce_content IS NOT NULL" )->first();
	}
}